Button stitching machines



M11112, 1954 c. w. JOHNSON ETAL 3,132,613-

BUTTON STITCHING MACHINES Filed April 5, 1960 3 Sheets-Sheet 1 FlG.l

INVENTOR. CARL W. JOHNSON MATHIAS PEDERSEN I ATTORNEY y 12, 1964 c. w. JOHNSON ETA]. 3,132,613

BUTTON STITCHING MACHINES 3 Sheets-Sheet 2 FIG.2

JWI I IH IAWRH Filed April 5, 1960 INVENTOR. CARL W. JOHNSON MATHlAS PEDERSEN ATTORNEY y 1964 c. w. JOHNSON ETAL 3,132,613

BUTTON STITCHING MACHINES Filed April 5, 1960 3 Sheets-Sheet 5 INVENTOR. CARL W. JOHNSON MATHIAS PEDERSEN United States Patent 3,132,613 BUTTGN STITCHING MACHINES Carl W. Johnson, Brooklyn, and Mathias Pedersen, Valley Stream, N.Y., assignors to American Machine & Foundry Company, a corporation of New Jersey Filed Apr. 5, 1960, Ser. No. 20,142 12 Claims. (Cl. 112-110) This invention relates to sewing machines, and more particularly to improvements in machines for attaching buttons and similar fastening devices to materials, such as mens and womens coats and the like, in a manner closely simulating hand sewing.

In accordance with the present invention, there is provided a machine which effects the attachment of buttons in the manner described above, and also includes mechanism operative to handle the thread in such manner that at all times a minimum of tension is imposed thereon, and it is so controlled that danger of snarling, spitting bythe needle, or breaking is substantially eliminated.

The invention constitutes improvements to button stitching machines of the type disclosed in Patterson et al. Patent 2,739,550, granted March 27, 1956, and uses a needle having an eye between its pointed ends. In this type of machine, the needle is threaded with a relatively short thread having a fixed end and a free end, and in the course of attaching a button, the loose end of the thread is pulled through the button and the Work and maintained clear of the path of the needle. :In accordance with the invention, there are provided improved means for handling the thread not only above the work, but also below the work so that at all times during-the operation of the machine of which the invention forms a part, there is a positive control exerted on the thread. Thus there is less wear and tear on the thread, and each button sewed is more firmly and uniformly secured to the work, and will remain in its attached position longer in the normal wearing of a garment to which it is attached. This desirable improvement is achieved by providing thread supporting means positioned above and below the work supporting table on which the goods rest, and also providing alternately operating thread handling and pulling means which coact with the supporting means in pulling the loose end of the thread through the material and disposing it upon one or the other of the supporting means alternately.

We have found that in a button sewing machine of the type described, there is a tendency for the needle to deflect away from the work as it travels downwardly therethrough. This results in needle breakage. The invention therefore includes the provision of means coacting with the needle in such Way that the needle is always constrained to move in a given perpendicular path downwardly as it passed through a selected hole in a button and through the material. In this manner needle breakage is held to a minimum and for all practical purposes eliminated.

It is an object of the invention to provide a sewing machine having novel thread handling devices and thread supports coacting therewith such that in the operation of the machine, the thread at all times is pulled properly through the material and disposed on supporting means thereby eliminating undue tension on the thread, snarling, spitting by the needle, and breakage of the thread.

It is a further object of the invention to provide improved thread handling mechanism for a sewing machine in the form of opposed alternately operating thread pullers which are eflfective in engaging loops of thread both above and below the material, which thread pullers are operative alternately in pulling the loose end of the thread through the work and disposing it clear of the path of travel of the needle so that breakage and other damage to the thread is eliminated.

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A further object of the invention is the provision of novel thread supporting means mounted on opposite sides of the work support of a sewing machine, which may be in the form of arcuate members or tubes in which the thread is disposed by the thread pullers as the loose end of the thread is pulled through the work, and which are operative to confine the thread and substantially prevent whipping thereof and fraying of the ends. These members also are operative to maintain the thread out of the path of the needle as it performs its movements.

The invention is further characterized by the provision of means coacting with the needle in such manner that any tendency of the needle to deflect out of its normal path of travel is substantially eliminated, thereby reducing breakage of needles to a minimum.

The invention is further characterized by the pro vision of a movable needle guide adapted to be positioned adjacent the path of travel of the needle and. so located with respect to a button and the work that as the needle moves through a selected button hole and the work, its path of travel is, so controlled that any tendency of the needle to deflect as it moves through the work is prevented, thereby eliminating breakage of the needle.

With these and other objects not specifically mentioned in view, the invention consists in certain combinations and constructions which will be hereinafter fully described, and then set forth in the claims hereunto appended.

In the accompanying drawings which form a part of this specification, and in which like characters of reference indicate the same or like parts:

FIG. 1 is a front elevation of a button stitching machine embodying the invention.

FIG. 2 is a side elevation, partly in section, of the same.

FIG. 3 is a plan view of the upper looper arm in conjunction with its thread guide channel, taken on line 33 of FIG. 1.

FIG. 4 is a detailed plan view of the needle guide member.

FIG. 5 is a partial detailed side elevation of elements employed in the button stitching operation.

FIG. 6 is a front elevation, partly in section, illustrating the thread pulling action of the upper looper during post winding operation.

FIGS. 7 and 8 are side elevations illustrating the successive upper and lower looper actions during button stitching operations.

Referring to FIGS. 1 and 2 of the drawings, the button sewing machine, which may be of the same general type as that shown in the above referred to Patterson et al. patent, comprises a center support frame designated generally 1t] and a combined frame and housing 12 spaced from and secured to frame 10 by a suitable supporting member 14.

The machine is provided with an upper needle bar 16 and an opposed lower needle bar 18 mounted for vertical reciprocating movement in opposed axial alignment on the opposite sides of work supporting member 116 of the machine. Needle bars 15 and 18 are provided with actuating members 20 and 22 respectively. Actuating members 20 for upper needle bar 16, as shown in FIG. 5, slidably engages with a block 24 pivotally mounted on the free end of actuating arm 26. Actuating member 22 for lower needle bar 18 slidably engages a block 28 pivotally mounted on the free end of actuating arm 30 which imparts vertical reciprocating motion to lower needle bar 18. Upper and lower needle bars 16 and 18 are guided in suitable bushings 32 and 34, respectively. The construction and operation of actuating arms 26 and 30 and upper and lower needle bars 16 and 18 are essentially the same as disclosed in the above mentioned Patterson et al. patent, and since their specific constructions do not form Q3 specific parts of the invention, further description and disclosure thereof are omitted in the interest of brevity.

As mentioned hereinabove, the sewing machine disclosed uses a double ended needle 36 having an eye located between its pointed ends, preferably about midway through its length through which the thread passes. In accordance with the invention, the machine is provided with novel thread pulling mechanism in the form of an upper thread puller 4t? and a coacting lower thread puller 38. These thread pullers are so constructed and operate in such manner that the thread is subjected to a minimum of strain as one or the other of the thread pullers pulls the loose end of the thread either through a selected button hole and the material, or through a selected button hole only after each pass of the needle through one or the other. In other words, one of the thread pullers 38 or it operates during each half cycle of the machine.

Lower thread puller 38, as shown in FIGURES l, 2 and 3, comprises an arm 39 adjustably attached to lever arm 42 mounted on horizontal shaft 44 rotatably supported by two bearing brackets 46 and 48, suitably secured to the frame of the machine. A gear 50 mounted on shaft 44 meshes with an intermediate gear 52 supported on stud 68. Gear 52 meshes with and is driven by gear 54 mounted on shaft 56 rotatably supported in bracket 48 and other suitable bearing brackets (not shown). Attached to shaft 56 is another gear 58 which through intermediate gear 6t) mounted on stud 66 meshes with and is driven by gear 62 mounted on the main drive shaft of the machine.

Carried on the free end of lower thread puller 38 is a suitably shaped thread pulling member 70 which is operative to engage a loop of thread L (FIG. 8) formed after needle 36 is passed in one direction through a selected portion of the material, i.e., a selected button hole and material M to which it is being attached, by upper needle bar 16, and then pulled downwardly and moved slightly upwardly by lower needle bar 18 as it passes needle 36 in the opposite direction through another selected portion of the material, i.e., a selected hole in button B, and into the upper needle bar 16. The construction and operation of the needle bars, as mentioned hereinabove, are essentially the same as that described and illustrated in the above mentioned Patterson et al. patent and further description and disclosure thereof are deemed to be unnecessary.

it will be understood that, as in the machine illustrated in the Patterson et al. patent, a machine embodying the invention is provided with a work support table 116, see FlGS. -8 inclusive. The material to which a button is to be attached is bent or folded over the nose N or" work support table 116 and the latter is disposed, as shown in PEG. 7, for attachment of a button thereto. The work support table 116 can be of the same type as that disclosed in the Patterson et al. patent. It is mounted for movement into and out of selected operative positions between the opposed needle bars, as shown in FIGS. 58 inclusive, and its path of movement is controlled by suitable cam means (not shown) in order that the desired passing of the needle back and forth through the button and material M, and the button only may take place in the sequence illustrated in FIGS. 58 inclusive, and also as shown and described in detail in the Patterson et al. patent.

As viewed in FIGURE 1 of the drawings, thread puller 38 rotates in a clockwise direction, and its thread pulling member 70 after engaging with a loop of thread L, pulls the loose end of the thread downwardly through a selected hole in button B and the material M, and disposes it in an arcuate thread receiving channel or tube 72. Channel or tube 72 is attached by suitable means, such as screws 74, to posts 76 preferably formed integrally with center support frame 10. Thread receiving channel 72 in the illustrated embodiment is substantially square in cross section and its front side is provided with an arcuate slot-like opening 78 through which the shank of thread puller 38 extends during its thread pulling and disposing operation. Obviously, if desired, tube 72 could have any other suitable cross sectional shape. It should be noted that as the loose end of the thread is pulled by pulling member 70 it is not only confined by the walls of tube 72 against whipping and other damage thereto, but also is disposed thereby on the bottom support surface of tube 72. Thus the thread is maintained clear of the path of needle 36 below work support table 116.

Upper thread puller 4th comprises an arm 41 adjustably mounted on lever arm 80 which in turn is attached to the forward end of horizontal shaft 82, as shown in FIGS. 1 and 2. At the opposite end of shaft 82 is attached a gear 84. Shaft 82 is rotatably supported in suitable bearings in the frame of the machine. Gear 84 is driven by an intermediate idler gear 86 meshing with and driven by a gear loosely mounted on horizontal stationary shaft 90 suitably supported in the frame of the machine. Gear 88 is provided with a hub on which is formed a gear 92 meshing with gear 94 which in turn meshes with and is driven by gear 62 on the main drive shaft 64 of the machine.

Suspended from the free end of shaft 90 is a bearing lug 96 which at its free end fixedly supports stud 98 on which gear 86 is rotatably mounted. As shown in FIGS. 1 and 2, stud 98 also is supported by another bearing lug 100 which is loosely mounted on and suspended from the end of shaft 82. Bearing bracket 100 operates to stabilize the position of stud 98 and thereby to maintain gear 86 in proper meshing engagement with gear 88.

Carried on the free end of thread puller arm 41 is a thread pulling member N2, which is of the same design and construction as thread pulling member 79 of lower thread puller 38. Thread pulling member 102 operates to engage with a loop of thread L2 which is formed after needle 36is passed upwardly by needle bar 15; through a selected button hole in button B to upper needle bar 16 which then moves slightly downwardly in the same general manner as disclosed and described in detail in the above mentioned Patterson et al. patent. Reference is made to FIG. 7 of the drawings which discloses the formation of loop L2 and the engagement of thread pulling member 102 of thread puller 4ft therewith.

As in the case of thread puller 38, upper thread puller 40, as viewed in FIGURE 1, also moves in a clockwise direction. In this way, as thread pulling member 102 carried by thread puller 4% moves into engagement with loop L2, it pulls the loose end of the thread upwardly through the work, i.e., a selected hole in button B and disposes it in arcuate thread receiving channel or tube This channel or tube 164 may be attached directly to the frame of the machine as in the case of thread receiving tube 72. However, as illustrated herein, tube 194 is attached by suitable means, such as screws 1%, to a suitably shaped support member 108 hingedly mounted on the upper portion of housing member 110 of the machine. It will be appreciated that whenever it is desired to make repairs or adjustments to the upper portion of the machine, supporting member 198 may be swung upwardly, thereby providing access to the parts of the machine in housing member 110. Fixed to supporting member 193 is a plate 169 which serves as a safety guard to prevent injury to the operator of the machine.

Tube 104, like tube 72, is substantially square in cross section, although it could have any other suitable cross sectional shape if desired. The front side of tube 104 is provided with an arcuate slot or opening 112 through which the shank of thread pulling member 132 extends during its thread pulling and disposing operation. Thread receiving channel or tube 104 performs the same function as channel '72.

The nature and construction of thread receiving channels or tubes '72 and 104 provide means for carrying out one of the objects of the invention which is to confine the thread and prevent it from whipping and fraying and also to dispose and support the loose end of the thread at all times clear of the path of travel of the needle.

As shown in FIG. 1 of the drawings, thread pullers 38 and 40 are approximately 180 out of phase. Each revolves a full 360 once during each half cycle of the machine in pulling the loose end of the thread through and away from the work after each pass of the needle. This prevents interference between the needle and the loose end of the thread during sewing operations, eliminates undue tension or harmful strain on the loose end of the thread and also prevents whipping or thread fraying duringthe operation of the machine, as described above.

FIGS. 7 and 8 illustrate the position of the thread pulling members 70 and 102, the work support table 116, the button check 114, and the upper and lower needle bars 16 and 18 during the respective movements of needle 36 in opposite directions.

FIG. 6 illustrates the general operation of the machine during the posting operation or the operation in which thread is wound around the shank of thread extending between material M and the under side of button B so as to form a firm post which supports the button away from the material M to which it is attached in a manner closely simulating hand sewing. With further reference to FIG. 6, it will be understood that chuck 114 and work support table 116 are moved alternately by cam means (not shown) to the right and left in order that the needle may move down along one side of the shank of thread and then up along the other as it winds thread about the shank to form the desired post. j

i As mentioned heretofore, button B is held properly with respect to material M to which it is to be attached in the jaws of a suitable button chuck 114. The construction and operation of button chuck 114, the work support table 116 and the manner in which they are moved relative to needle 36 and needle bars 16 and 18 in effecting the desired attaching and post winding operations may be the same as those disclosed and described in the Patterson et a1. patent above referred to, so that further detailed description and disclosure thereof are deemed to be unnecessary.

Referring to FIGURES 5, 7 and 8, it will be noted that the material M to which a button is to be attached is folded over the nose of support table 116. As shown more particularly in FIGURE 7 the first pass of the needle downwardly through a selected hole of button B and then through the material M is such that the needle 36 passes through the material M in the form of a blind stitch. As the needle 36 moves downwardly against the material it has a tendency to deflect and bend out of its true vertical path of movement into needle bar 18. Since this condition is undesirable, there is provided a needle guide finger 118 which insures that needle 36 at all times will pass in its true vertical or aligned path from needle bar 16 into its complementary needle bar 18. By means of this finger flexing and breakage of needles is held to a minimum.

In the case of a mans coat, such for example as a three button coat, the two lower buttons are attached in such a way that the first stitch is passed through all of the fabric and appears on the under side of the garment as a tack stitch. In effecting this tack stitch, guide finger 118 is instrumental in insuring the proper guiding of the needle downwardly through a selected button hole and through the material to which the button is attached. This condition is different from that described above which applies with respect to the top button where the first switch is a blind switch. The pattern of the cam means (not shown) which control the selective movements of work support table 116, is such as to dispose the material relative to needle 36 so that the desired positioning of material M is obtained during button stitching and post winding operations.

As shown in FIGURE 5, guide finger 118 is provided with a suitably shaped curved portion 119 which is adapted to be moved momentarily into a position adjacent needle 36 during the time that needle 36 is moving downwardly into and through material M. Guide finger 118 is formed with a suitably shaped hub 121 on its upper portion (FIGURE 5) which is mounted on shaft 120. The rear end of shaft is clamped to the free end of an arm 122, the other end of which is formed with a fork 124 in which engages a roller 126 pivotally carried by the free end of an actuating arm or lever 128 loosely supported on shaft 90. Actuating lever 128 forms one arm of a compound lever having another arm 130 which mounts a cam follower or roller 132. Follower 132 runs on a suitably designed cam 134 mounted on shaft 82. The shape of cam 134 and its timing are such that guide finger 118 is moved towards and from needle 36 in proper timed relation with the movement of needle bar 16 in its operation in passing needle 36 through the button B and material M. Shaft 120 is rotatably supported in a suitable bearing lug projecting from the frame structure of the machine. A tension spring 138 (FIGURE 2) is provided for the purpose of maintaining cam follower 132 constantly in engagement with cam 134.

What we claim is: j j

1. A sewing machine of the type described having a work support table, an upper and a lower needle bar located on opposite sides of said table adapted to alternately project a double pointed needle having an eye between its ends and a thread having a fixed end and a portion having a loose end running through its eye back and forth through work to be sewed, comprising an upper thread puller, a lower thread puller, an upper thread support positioned adjacent the path of travel of said upper thread puller for receiving said portion of said thread having said loose end when said portion is pulled completely through said work by said upper thread puller, a lower thread support mounted adjacent said lower thread puller for receiving said portion of said thread having said loose end of thread when pulled completely through the work by said lower thread puller, means driving each of said thread pullers through complete revolutions of 360 during each individual operation of said thread pullers, whereby each of said thread pullers remains in engagement with said thread until said pullers dispose said loose end of said portion of said thread pulled completely through said work alternately on said supports and travel past said loose end thereof, and means mounting said thread pullers for operation so that only one thread puller at any time is actively engaged in pulling said thread.

2. A sewing machine of the type described having a work support table, an upper and a lower needle bar located on opposite sides of said table adapted to alternately project a double pointed needle having an eye between its ends and a thread having a fixed end and a portion having a loose end threaded through its eye back and forth through work to be sewed, comprising an upper thread puller, a lower thread puller, an upper arcuate thread receiving and supporting member positioned adjacent the path of travel of said upper thread puller for receiving said portion of said thread having said loose end when pulled through said work by said upper thread puller, a lower arcuate thread receiving and supporting member mounted adjacent said lower thread puller for receiving said portion of'said thread having said loose end of thread when pulled completely through the work by said lower thread puller, means driving said thread pullers through complete revolutions of 360 during each individual operation of said thread pullers, such that each of said thread pullers maintains contact with said thread until said thread pullers dispose said portion of said thread on said supports and move freely past the 7 loose end thereof in completing each individual thread pulling operation, and means mounting said thread pullers for operation so that only one thread puller at any time is actively engaged in pulling said thread.

3. A sewing machine of the type described having a work support table, opposed alternately operated needle bars mounted on opposite sides of said work support table for alternately projecting a double pointed needle, provided with an eye between its ends and a thread having a fixed and a loose end passing through said eye, back and forth through work to be sewed, comprising a first thread puller, means mounting said thread puller for rotation into engagement with a loop of thread formed on one side of said work for pulling said loose end of said thread completely through said work, a first arcuate thread receiving and supporting member mounted adjacent the path of travel of said first thread puller for receiving and supporting said loose end of said thread as it is drawn completely through said work, a second thread puller, means mounting said second thread puller for rotation on the opposite side of said work, a second arcuate thread receiving and supporting member mounted adjacent the path of travel of said second thread puller for receiving and supporting said loose end of said thread as it is drawn completely through said work, means for alternately rotating each of said thread pullers through complete revolutions for pulling said thread, and means disposing said first and said second thread pullers relative to each other so that one of said thread-pullers only is engaging and pulling thread during each half cycle of said machine.

4. The invention defined in claim 1 wherein each of said thread supports comprises a tube having a slot extending along the length thereof through which said thread puller moves freely along with the loose end of thread engaged thereby in delivering the loose end of said thread into said support, said tube being provided with spaced walls operative to confine said loose end of the thread disposed in said tube against whipping as said thread is disposed therein.

5. The invention defined in claim 3, including a fixed thread engaging and pulling member mounted at the free end of each of said thread pullers, and wherein each of said arcuate thread receiving and supporting members comprises a tube having laterally spaced Walls and a thread supporting surface, said Walls being operative to con fine the loose end of said thread as it is pulled through said work by one or the other of said thread pullers against whipping, and said surface being operative to support the loose end of said thread disposed thereon.

6. The invention defined in claim 1 wherein each of said thread pullers comprises a shaft, a lever mounted on said shaft, an arm adjustably mounted on said lever, and a thread engaging and pulling member carried by the free end of said arm.

7. The invention defined in claim 6 wherein each of said thread supports includes an arcuate tubular member having an arcuate slot, through which said arm of said thread puller extends whereby said thread engaging and pulling member can travel through said tubular member and dispose the loose end. of said thread therein, said tubular member being operative to confine the loose end of said thread against whipping.

8. A sewing machine of the type described'having a work support table, opposed alternately operated needle bars mounted on opposite sides of said work support table for alternately projecting a double pointed needle provided with an eye between its ends and a thread having a fixed and a loose end passing through said eye, back and forth through work to be sewed, comprising a first thread puller, means mounting said thread puller for rotation into engagement with a loop of thread formed on one side of said work for pulling said loose end of said thread completely through said work, an arcuate thread receiving and supporting member mounted adjacent the path of travel of said first thread puller for receiving and supporting said loose end of said thread as it is drawn through said work, a second thread puller, means mounting said second thread puller for rotation on the opposite side of said Work, a guard frame, means hingedly mounting said guard frame adjacent said second thread puller thereby to protect an operator of said machine against injury, and a second arcuate thread receiving and supporting member mounted on said guard frame for receiving and supporting the loose end of said thread pulled through the work by said second thread puller.

9. The invention defined in claim 1 wherein each of said thread supports comprises a tubular member having a longitudinal slot through which one of said thread pullers extends with its respective thread pulling member traveling within said tubular member, said tubular member having spaced surfaces which confine the loose end of the thread disposed in said tubular member against whipping and snarling.

10. In a sewing machine the combination with a pair of opposed axially aligned needle bars adapted to support and travel a double pointed needle having an eye between its ends back and forth through work to be stitched, said eye being threaded with a thread with a diminishable portion having a loose, and a fixed end, means for supporting an article to be stitched between said opposed needle bars and in the path of travel of said needle, a rotary thread puller operatively associated with each of said needle bars, means mounting said needle bars for out of phase relationship one relative to the other for alternately pulling said diminishable portion of said thread having said loose end completely through said work, and means for rotating each of said thread pullers through 360 in its operation of pulling said portion of said thread completely through said work.

11. The sewing machine defined in claim 10 wherein each of said thread pullers includes a thread pulling member adapted to engage loops of thread formed in said thread adjacent its respective needle bar, and an arcuate thread receiving and supporting element located adjacent the path of travel of each of said thread pulling members for receiving and supporting said portion of said thread having said loose end disposed thereupon by a moving thread puller, said thread pullers being constructed and arranged to maintain contact with said portion of said thread during each individual pulling operation and until said loose end of said portion of said thread is disposed by a thread puller on its respective supporting element.

12. The invention defined in claim 11 wherein said ar cuate thread receiving and supporting elements comprise arcuate tubes having spaced walls operative to confine said portion of said thread having said loose end against whipping and snarling, said tubes being formed with arcuate slots adapted to accommodate said thread pullers with said thread pulling members travelling within said tube during the thread pulling operations.

References Cited in the file of this patent UNITED STATES PATENTS 507,825 Miller Oct. 31, 1893 978,017 Gnoeth Dec. 6, 1910 1,408,821 Merrick Mar. 7, 1922 1,596,369 Nelson Aug. 17, 1926 2,436,449 Pikul Feb. 28, 1948 2,692,569 Ketterer Oct. 26,1954 2,739,550 Patterson et al. Mar. 27, 1956 

1. A SEWING MACHINE OF THE TYPE DESCRIBED HAVING A WORK SUPPORT TABLE, AN UPPER AND A LOWER NEEDLE BAR LOCATED ON OPPOSITE SIDES OF SAID TABLE ADAPTED TO ALTERNATELY PROJECT A DOUBLE POINTED NEEDLE HAVING AN EYE BETWEEN ITS ENDS AND THREAD HAVING A FIXED END AND A PORTION HAVING A LOOSE END RUNNING THROUGH ITS EYE BACK AND FORTH THROUGH WORK TO BE SEWED, COMPRISING AN UPPER THREAD PULLER, A LOWER THREAD PULLER, AN UPPER THREAD SUPPORT POSITIONED ADJACENT THE PATH OF TRAVEL OF SAID UPPER THREAD PULLER FOR RECEIVING SAID PORTION OF SAID THREAD HAVING SAID LOOSE END WHEN SAID PORTION IS PULLED COMPLETELY THROUGH SAID WORK BY SAID UPPER THREAD PULLER, A LOWER THREAD SUPPORT MOUNTED ADJACENT SAID LOWER THREAD PULLER FOR RECEIVING SAID PORTION OF SAID THREAD HAVING SAID LOOSE END OF THREAD WHEN PULLED COMPLETELY THROUGH THE WORK BY SAID LOWER THREAD PULLER, MEANS DRIVING EACH OF SAID THREAD PULLERS THROUGH COMPLETE REVOLUTIONS OF 360* DURING EACH INDIVIDUAL OPERATION OF SAID THREAD PULLERS, WHEREBY EACH OF SAID THREAD PULLERS REMAINS IN ENGAGEMENT WITH SAID THREAD UNTIL SAID PULLERS 